<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>WebSocket Chat</title>
</head>
<body>
    <script type="text/javascript">
        var socket;
        if (!window.WebSocket) {
            window.WebSocket = window.MozWebSocket;
        }
        if (window.WebSocket) {
            socket = new WebSocket("ws://localhost:8888/websocket");
            socket.onmessage = function(event) {
                var ta = document.getElementById('responseText');
                ta.value = ta.value + '\n' + event.data
            };
            socket.onopen = function(event) {
                var ta = document.getElementById('responseText');
                ta.value = "连接开启!";
            };
            socket.onclose = function(event) {
                var ta = document.getElementById('responseText');
                ta.value = ta.value + "连接被关闭";
            };
        } else {
            alert("你的浏览器不支持 WebSocket！");
        }

        function send(message) {
            if (!window.WebSocket) {
                return;
            }
            if (socket.readyState == WebSocket.OPEN) {
                socket.send(message);
            } else {
                alert("连接没有开启.");
            }
        }
    </script>
    <form onsubmit="return false;">
        <h3>WebSocket 聊天室：</h3>
        <textarea id="responseText" style="width: 500px; height: 300px;"></textarea>
        <br> 
        <input type="text" name="message"  style="width: 300px" value="">
        <input type="button" value="发送消息" onclick="send(this.form.message.value)">
        <input type="button" onclick="javascript:document.getElementById('responseText').value=''" value="清空聊天记录">
    </form>
    <br> 
    <br> 
   
</body>
</html>